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Finding the Fourth Proportional to 295,780.60, 443,670.90 and 257,289.40

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Solution

The fourth proportional to 295,780.60, 443,670.90 and 257,289.40 is: 385,934.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    295,780.60 : 443,670.90 = 257,289.40 : x
  2. Step 2: Convert to fraction form
    295,780.60/443,670.90 = 257,289.40/x
  3. Step 3: Cross multiply
    295,780.60x = 443,670.90 × 257,289.40
  4. Step 4: Simplify right side
    295,780.60x = 114,151,819,658.46
  5. Step 5: Solve for x
    x = 114,151,819,658.46/295,780.60
  6. Step 6: Final answer
    x = 385,934.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.